London → San Francisco Turbulence Forecast
General route view · UA949 · United Airlines · Live tracking: FlightAware
Forecast
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What the air is usually like on this route
London to San Francisco is about 8,616 km and usually takes around 12h in the air. The track it follows runs over the British Isles, the North Sea, and the North Atlantic.
Over the North Sea the air is usually calm and settled. Nearer the British Isles and the North Atlantic the weather turns more Atlantic and the ride can be livelier for short spells, still firmly within the routine. This track threads jet-stream latitudes, so in winter you may feel a few minutes of light, choppy air high up; summer usually rides calmer.
A flight this long spends hours at a high, smooth cruise. Even when one stretch is bumpy it is a small slice of the whole trip, and the aircraft treats it as routine.
Route facts
- About 8,616 km; typical flight time 12h.
- Aircraft on this route typically cruise around 11 km (FL340), above most weather.
- The path crosses the British Isles, the North Sea and the North Atlantic.
- The route crosses jet-stream latitudes; occasional brief, light chop is normal and not a safety concern.